Transitions used in essays

Air has been used for residential, [18] automobile, and turbine-powered aircraft [19] [20] air-conditioning and/or cooling. The reason why air is not more widely used as a general-purpose refrigerant is because there is no change of phase , and is therefore too inefficient to be practical in most applications. [18] It has been suggested that with suitable compression and expansion technology, air can be a practical (albeit not the most efficient) refrigerant, free of the possibility of environmental contamination or damage, [18] and almost completely [21] harmless to plants and animals.

Transitions used in essays

transitions used in essays

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